M365 OneDrive, Teams or SharePoint (Information) External or Guest Sharing
This article gives instruction for Microsoft 365 file sharing to external users or guests.
Please see Microsoft's support article for external or guest sharing in OneDrive and SharePoint for instruction on how to share your documents or folders.
Note: If you are attempting to share externally from an existing SharePoint site and receiving an error message, external sharing was not enabled for your SharePoint site when it was originally created, you will need to have this functionality enabled by a higher level support team.